Grass Valley Imagestore 750 v.3.0.1 User Manual
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Advanced Audio
Dolby
•
0.000 (–inf dB)
Note: The meaning of this field is defined as described only if the audio coding mode is
2/1, 3/1, 2/2 or 3/2. If the audio coding mode is 1/0, 2/0 or 3/0 then the meaning of this
field is reserved.
•
‘Lo/Ro Surround Mix Level’
This setting indicates the nominal down-mix level of the surround channels with respect to
the left and right channels in a Lo/Ro down-mix. Choices include the following:
•
0.841 (–1.5 dB)
•
0.707 (–3.0 dB)
•
0.595 (–4.5 dB)
•
0.500 (–6.0 dB)
•
0.000 (–inf dB)
Note: The meaning of this field is defined as described only if the audio coding mode is
2/1, 3/1, 2/2 or 3/2. If the audio coding mode is 1/0, 2/0, or 3/0 then the meaning of this
field is reserved.
•
‘Dolby Surround EX
TM
Mode’
3
This mode indicates whether the program has been encoded in Dolby Surround EX.
TM
This
information is not used by the AC-3 decoder, but can be used by other portions of the audio
reproduction equipment. Choices include the following:
•
Not indicated.
•
Not Dolby Surround EX
TM
encoded.
•
Dolby Surround EX
TM
encoded.
Example: Note: The meaning of this field is defined as described only if the audio coding
mode is 2/2 or 3/2. If the audio coding mode is 1/0, 2/0, 3/0, 2/1 or 3/1 then the meaning
of this field is reserved.
•
‘Dolby Headphone Mode’
This setting indicates whether the program has been Dolby Headphone-encoded. This infor-
mation is not used by the Dolby Digital (AC-3) decoder, but can be used by other portions of
the audio reproduction equipment. If the value is set to the reserved code, the decoder
should still reproduce audio. Choices include the following:
•
Not indicated.
•
Not Dolby headphone encoded.
•
Dolby headphone encoded.
Note: The meaning of this field is only defined as described if the audio coding mode is
2/0. If the audio coding mode is 1/0, 3/0, 2/1, 3/1, 2/2 or 3/2 then the meaning of this
field is reserved.
•
‘AD Converter Type’
This setting indicates the type of A/D converter used to capture the PCM audio. This informa-
tion is not used by the AC-3 decoder, but can be used by other portions of the audio repro-
3. “Surround EX” is a trademark of Dolby Laboratories.